X-ray apparatus



G. H UTALING AND W. CUBEE,

MAY APPASMUS. l

APPLICATION FILED JUNE 3U IQIQ. vggggjggggjqgo Patented Oat. 3, 1921,

Inventors: George Hotaljg, Wlem D Coolldga TheiVMw/ 3M- AttornegPatented ct. 3, i922.

" UNITE-n stares GEonGE HOTALING ANI) WILLIAM n. contines,y orscnENEcTAnY, NEW YORK, 4.srsIGfNons To GENERAL ELECTRIC COMPANY, nCORPORATION or NEW YORK.

X-RAY APPARATUS.

T all 'whom it may concern ,Be it `known that we, GEORGE Ho'rALINc andVILLIAM D. CooLIncE, citizens ot the United' States, residin atSchenectady,

county of Schenectady, State of New York, `have invented certain new anduseful lmprovements in X-Ray Apparatus, of which y the following isaspeciication.

The .present invention relates to X-ray vapparatus and in particular tothe structure Y which is adapted to carry the electrical conductorsbetween the source ot current sup- .plyfand an X-ray tube.

It is the object of 'our invention to prol vide: a compact, reliabledevice which may.

, be detachably mounted upon an X-ray apparatus, and which will reduceto a. mini- -jmum the Adanger of serious injury by electric shock'tothose concerned with the oper- 20 ation of an X-ray device. Ourinvention is concerned with structural features, the novel details ofwhich willv be pointed out with greater particularity in the appendedclaims.

A more complete understanding of our invention maybe had from the.following specification taken in connection with the'accompanyingdrawing in which Fig. 1 is a perspective' view of the complete X-rayoutfit of ,which the reel constituting'our invention forms a part g Fig.2 is a sideview of the reel with part of the side wall broken away; Fig.

3 vis a sectional view of one of the reels carrying a. resistor; Fig. 4is a detailed view showing the 'electrical connection of a con- 35duotor coupled to the reel, and Fig. 5 is a diagram ot electricalconnections. `As shown in Fig. 1,-conductor reels 1, 2,

comprising our invention, may be used in connection with a pedestalstand 3 on which is mounted an `X-ray tube 4 supported by clamps 5carried by an extension arm 6. To the ree-ls 1, 2, are attached cableconductors 7, 8, respectively serving for. connection to the terminals9, 10 of a transformer 11. The

cable 7 comprises two conductors 12, 13, connected to different taps ofa transformer secondary 14 (Fig. 5), and `conveying a heating current tothe cathode of the X-ray tube through the reel, as will be hereinatterdescribed. One of the reels is provided with an adjustable impedance 15,either ohmic or inductive, the part-s of which are shown in j detail inFig. 3, whereby the cathode heating current may be regulated. The reel 2is'pro- 55. vided witha single conductor'cable.

es shown in Fig. 8,'the cable reel comprises a frame or spool 16 made ofsuitable 'insulating material such, for example, as hard rubber, orbakelite. Connected to the spool 16 is a flat spiral spring 17, theinner end of which is .attached in any convenientway to a stationarybarrel 18, tor example, by means ot' a screw 19. The opposite end of thespring 17 is connected by a. brass ring 46 to the spool 16. The barrel18 is connected to spacing plates 20, 21, and to a supporting plate 22by means of a screw bolt 28. The spacingplate 2O may consist of suitableinsulating material such as hard rubber, or baltelite. The plate orwasher 21 consists of metal. i Between the spacing plate 20 and the reelside wall is a contact plate 24 (Fig. 2). Connected to the supportingplate 22 is a sleeve 25 containing a sliding contact or brush 26 whichis connected to the conductor 12 and is pressed into electrical contactwith the plate 24, by ai spring 27, the electrical circuit beingcompleted by a conductor as indicated. The conductor 18 is connected toa terminal 28 mounted on a plate 29 located on ,the opposite side of thereel. The plate 29 is in turn connected by a screw 47 to a coiledresistance wire 15 mounted on a base 30 of suitable insulating material,as for example, asbestos compound. A screenl covers the resistor 15 andprevents unintentional movement ot' the adjustable rheostat arm 32. Thisarm is rotatably mounted on a pin 33 and electrically connected by saidpin to a conductive plate 34. The rheostat arm is ordinarily adjustedonly once tor any given X-ray tube and circuit voltage, and, therefore,preferably is not made easily accessible.

The plate 34 is electrically connected to a 95 conductive plate 35 byscrews 36. The plate 35 is connected through the plate 21, the barrel'18, and the spring 17 to one of the conductors 89 of the cable 38mounted on the reel, as shown in Fig. 4. The other cable 100 conductor"is connected tox the plate 24, which, as has been explained above, is incontact with the -brush 26. The two, conductors 37 and 39 are united toform a single cable by a surrounding insulating sheath 38 hav- 10.5 inga diameter approximating the distance between the, side ,walls 16 ot thereel. The end or the'cable 38 is provided with a suitable contact-makingcoupling 42. When not extended the cable 38 is wound upon the reel 110by the rotative efort of the spring 17 and when fully Wound the end ofthe cable is re-l to avoid the attendant noise and the odor of gaseousproducts of electrical discharges.

The electrical circuits from the transformer secondary to the electrodes44, 45, of the X-ray tube 4 will be understood without furtherexplanation by a comparison of F ig. 5 with Figs. l and 3. vIt will beobserved' that tlie electric circuits of the reel conductors aremaintained complete andinde endent whether the conductors are part y orwholly unvvound and no slack conductors are present as a source ofdanger.

lVhat we claim as new and desire to secure by Letters Patent of theUnitedStates, is,-'

A1. A reel for X-ray apparatus comprising a support, a rotatable holdermounted thereon, and a. cable adapted to be wound on said holder, anelectric circuit for conveyingelec'- tric current to said cable, andmeans mounted on said reel for regulating the current in said circuit.

2. A reel for Xfray apparatus comprising a rotatable frame, two flexibleinsulated conductors wound on said frame, an impedance mounted on saidframe, an electrical con nection between said impedance and one of saidconductors, means for maintainingr said conductors taut, and conductivemeans l'or completing circuits through said conductors independent ofthe rotation of said reel.

making electrical contact with said plate, 40V`V4 two flexible insulatedwires adapted to be Wound on said frame, one of vsaid wires beingelectrically connected to-said plate, and means for completing anelectrical circuit through the second wire electrically insulated fromthe wire connected to said plate. 4.*A reel for X-ray apparatuscomprising a rotatable-non-conducting frame, a spring connected toresist rotation of said fra-me, a conductive plate mounted on saidframe, a

brush making electrical Contact with said plate, an adjustable impedancemounted on said frame, a conductor -connected to said` plate, a secondconductor connected to one end of said spring, andn a. series electrical5,5'

connection between said resistor and one et said conductors. o

, 5. An X-ray apparatus comprising'a ped` estal, extensible means forsupporting anl X-ray tube in a desired position upon said pedestal,outwardly 'extending arms carried by said pedestal, reels adapted to bedemountably supported upon saidarms. conductors carried by said reelsfor connection tothe terminalsof said tube,'a'sliding eon- 65J tact forone of said conductors, and current regulating means mounted on one ofsaid reels.

In witness whereof, we have hereuntovset our hands this 27th dayofll'igie. 1919. GEORGE HOIRALING.

VILLIAM D. GOOLIDGE.

